A buck, a single - the dollar bill is perhaps the most recognized legal tender around the world. But did you know that before the American Revolutionary War, coins made up the U.S.'s currency - and there was not a dollar in sight.

As one of the leading auctions houses in the US, Rago Art has an annual sale of about $ 30 000 000. Their experts are frequently appearing as appraisers in the Antique Roadshow and have validated objects such as Andy Warhol "Jackie II" Artist’s Proof, 1966, valued at $20 000 in 2011 and Picasso's Madoura Urn, ca. 1960 for the value of $12 000 - $15 000.